Gas-engine fuel economizer



Sept. 15, 1925. 1,553,880

w. SCOTT GAS ENGINE FUEL ECONOMIZER Fi'led Aug. is. 1920 25 a? ,26 if 18 I x 8 5 1 1' B 723i 4 1a 232 a n 8% wzwtoi William Lester Scott.

1 Engine Fuel Economizers,

. porizer.

' Sco'rr,

- opemng 2 in gine casing.

Patented Sept. 15, 1925.

WILLIAM LISTER SCOTT, OF OAKLAND, CALIFORNIA.

GAS-ENGINE' FUEL ECONOMIZER.

Application filed August 16, 19.20. Serial 1%.. 463,995.

To on whom it may concern:

Be it known that I,-

a citizen of the United States, residing at Oakland, in

and State-of California, have invented certain new and useful Improvements 1n Gasofwhichthe following is a specification.

My invention is a gas mizer.

y drawing which forms a part fication.

Referring to the drawingz Figure 1 is a side elevation of my invention applied to a gas engine I I Figure 2 is a vertical section of the vaengine fuel econoinvention is illustrated in the annexed of this speci- Figure 3 is a vertical section of my inven tion omitting the vaporizer. Figure 4 is a side view of the heater. Figure'5 is an end view of the same.

Figure 6is. a

the drawing 1 indicates a vertical cylindrical tube, the lower end of which :being open. and extending into the .sump

the forward end of a gas en- Said tube'has an external bead 3 near itslower end in which is supported a screen 1, said bead being adapted to rest upon the, ed e of the sump opening to support thetu at the proper elevation. A head 5 is detachably fitted in the upper end of the tube 1 in which head is an intake valve 6 normally closed by a spring .7 whichsurrounds a screw 8 extending through and seated in said head, the endsof the spring bearing against the valve and a head 9 on the lower end of the screw. The valve 6 may be re ated by the" set screw 8. A horizontal tu 10 extends from the vertical 7 tube 1, said-tubes being of metal and inteis mounted the gas gral.' A flexible tube 11 connects to the end of the tube 10 and to the air inlet of theengine carbureter. 12. A vs. rizer 13 orizer has a threaded -opening 16 in which 1s screwed the upperenlarged threaded end of an air inlet tube 17 which extends downwardly to a pointnear thebottom" of the vaporizer, A' cup-shaped air heater 18 is secured to the outside of the exhaust manifold 14 by a screw stud 19 which extends from a transverse partition 20 in the heater WILLIAM Las'rnn" the county of Alameda ,phere therein, and ports 24 are the partition 20 for the passage of the heatsection on the line of- 26, the vaporizer bein on the exhaust mani old 14 of engine. The top wall 15 of the va fold. The partition 20 divides the heater" into two compartments 21'and 22, the compartment 21 resting adjacent the exhaust manifold 14 whereby the air in said compartment .is heated. Air inlets 23 are provided in the wall "of, the compartment 21 for the admission of air from the atmosprovided in ed, air from the compartment 21 into the compartment 22; A tube 25 leads from the compartment 22 and its outer end is inserted in the outer end of the vaporizer inlet tube 17 for the admission of heated air fromthe heater 18 into the vaporizer 13.

'A tube 26 is connected at one end to the top of the vaporizer by a union 27 and at its other end to the tube Why a union 28, onemember of the union 27 screwing into the vaporizer, and a threaded nipple 30 on the pipe 10 forming one member of the union-28. A screening disk 31, preferably of felt is placedin the inner end of the member'of the union 27 which screws into a threaded opening 29 in the top wall 15 of the opening 29 in the top of thevaporizer,

said disk serving to screen the water vapor passing from the vaporizer through the tube 26 into the tube 10.

Heated air and oil gas is taken into the carbureten 12 from the engine crank case through the tube 1, tube 10 and tube 11,

the screen 4 screening said air and gas; while water vapor at the same time is taken into the carbureter through tubes 26, 10 and 11 from the vaporizer 13, which contains water, through whichheated fresh air es from 'the heater 18 and tube 25 through tube 17, before entering the tube haust manifold 1a. 1 the engine requires more air than under normal conditions, the valve 6 automaticallyI opens and admits air into the tube 1 whic passes through tubes 10 and 11 into the carbureter'12.

Having described my invention, I claim: .1. In a fuel economizer for use with internal combustion engines, a T-shaped pipe fitting for connection with the breather pipe of said engine having a short vertical section with openings at each end'and a horilower end of'the vertical section slidably' i zontal section connection therewith, the

fitting within the breather pipe and .havmg a bead heated by the exto limit its downward movement v v the intake of the within the breather pipe, a screen supported within said vertical section at the beaded portion thereof, a cap for closing the opposite opening of said vertical section having an air admission port, an adjustable spring controlled valve carried by said cap for regulating the admission of air into said economizer, a tube adapted .to connect the horizontal section of said fitting with the air intake portion of the carbureter of said engine, said horizontal section constituting a suc tion pipe whereby oil vapor and heated air are drawn from the crank case, a water vaporizer mounted so as to be heated by said engine, and a water vapor outlet pipe for said vaporizer connected to the horizontal connection of said fitting.

In a device of the class described, a T- shaped pipe fitting having one end adapted to slidably fit within the breather pipe of' an internal combustion engine so as to support said fitting, means formed on said fitting for limiting the sliding movement of the fitting within said breather pipe, a tube adapted to connect the breather pipe with carburetor of said engine so that a partial vacuum'is maintained Within thecrank case during the operation ofsaid engine, a valve supported by said fitting-for affording atmospheric connection for said fitting when desired, means supported by the motor for producing water vapor and connecting means between said water vaporizing means and said pipe fitting.

3. In a device of the class described, a T- shaped pipe fitting. having one end adapted to fit within the breather pipe of an internal combustion engine, a tube adapted to connect the breather pipe with the intake of the carburetor of said'engine so that a partial vacuum may be maintained within the crankcase during the operation-of the engine, a valve supportedtby said fitting for afiording atmospheric connection for said fitting, spring means whereby said valve is normally held closed, said valve being automatically opened when the difference between atmospheric pressure and the pressure within the fitting exceeds the tension of said spring, means whereby the tension of said spring may be adjusted, means supported by the motor for producing water vapor and connecting means between the water vaporizing means and said pipe fitting.

4. In an internal combustion engine including a carburetor and a breather pipe connected with the'crank case: a fuel economizer afi'ording a connection between the breather pipe and the carburetor, said economi'zer being adapted to slidably fit within the breather pipe so as to be supported thereby, means to limit the sliding movement of said economizer within said breather pipe, adjustable means for controlling the amountof air passing through said economizer to the carburetor, means connected to the engine for producing water vapor, and a conductor connecting said vapor producing means with said economizer, said economizer constituting an extension of the air suction pipe of the'carburetor-whereby oil vapor and heated air are drawn from the crank case and water vapor' is caused to be mixed therewith as said oil vapor and heated air passes through the carburetor.

In testimony whereof I aflix my signature.

WILLIAM LESTER SCOTT. 

